<template>
  <div class="cart">
    <order-header title="我的购物车">
      <template v-slot:tips>
        <span>
          温馨提示：产品是否购买成功，已最终下单为准，请尽快结算
        </span>
      </template>
    </order-header>
    <div class="wrapper">
      <div class="container">
        <div class="cart-box">
          <ul class="cart-item-head">
            <li class="col-1"><span :class="['checkbox', {'checked': allCheck}]" @click="toggleAll"></span>全选</li>
            <li class="col-3">商品名称</li>
            <li class="col-1">单价</li>
            <li class="col-2">数量</li>
            <li class="col-1">小计</li>
            <li class="col-1">操作</li>
          </ul>
          <ul class="cart-item-list">
            <li class="cart-item" v-for="item of list" :key="item.productId">
              <div class="item-check">
                <span :class="['checkbox', {'checked': item.productSelected}]" @click="updateCart(item)"></span>
              </div>
              <div class="item-name">
                <img v-lazy="item.productMainImage">
                <span>{{item.productName + ',' + item.productSubtitle}}</span>
              </div>
              <div class="item-price">{{item.productPrice}}元</div>
              <div class="item-num">
                <div class="num-box">
                  <a href="javascript:;" @click="updateCart(item, '-')">-</a>
                  <span>{{item.quantity}}</span>
                  <a href="javascript:;" @click="updateCart(item, '+')">+</a>
                </div>
              </div>
              <div class="item-total">{{item.productTotalPrice}}元</div>
              <div class="item-del" @click="handleDelTip(item.productId)"></div>
            </li>
          </ul>
        </div>
        <div class="order-wrap clearfix">
          <div class="cart-tip fl">
            <a href="/">继续购物</a>
            共<span>{{list.length}}</span>件商品，已选择<span>{{checkedNum}}</span>件
          </div>
          <div class="total fr">
            合计：<span>{{cartTotalPrice}}</span>元
            <a href="javascript:;" class="btn" @click="order">去结算</a>
          </div>
        </div>
      </div>
    </div>
    <service-bar></service-bar>
    <order-footer></order-footer>
    <modal :showModal="showDelTip" btnType="3" title="温馨提示" @submit="deleteProduct" @cancel="showDelTip=false">
      <template v-slot:body>
        <span>您确定要删除该商品吗？</span>
      </template>
    </modal>
  </div>
</template>

<script>
  import OrderHeader from '@/components/OrderHeader'
  import OrderFooter from '@/components/OrderFooter'
  import ServiceBar from '@/components/ServiceBar'
  import Modal from '@/components/Modal'
  export default {
    name: 'cart',
    components: {
      OrderHeader, OrderFooter, ServiceBar, Modal
    },
    data() {
      return {
        list: [],
        allCheck: false,
        cartTotalPrice: 0,
        cartTotalQuantity: 0,
        checkedNum: 0,
        imageHost: '',
        showDelTip: false,
        delSelectedId: 0
      }
    },
    mounted() {
      this.getCartList();
    },
    methods: {
      getCartList() {
        this.axios.get('/carts')
        .then(res => {
          this.getResData(res)
        })
        .catch(err => {
          console.error(err)
        })
      },
      order() {
        let isNotCheck = this.list.every(item => !item.productSelected)
        if(isNotCheck) {
          this.$message.warning('请至少选择一件商品')
        } else {
          this.$router.push('/order/confirm');
        }
      },
      getResData(res) {
          this.list = res.cartProductVoList
          this.cartTotalPrice = res.cartTotalPrice
          this.allCheck = res.selectedAll
          this.imageHost = res.imageHost
          this.cartTotalQuantity = res.cartTotalQuantity
          this.checkedNum = this.list.filter(item=>item.productSelected).length
      },
      toggleAll() {
        let path = this.allCheck? '/carts/unSelectAll': '/carts/selectAll'
        this.axios.put(path)
        .then(res => {
          this.getResData(res)
        })
        .catch(err => {
          console.error(err); 
        })
      },
      updateCart(item, type) {
        let quantity = item.quantity,
            selected = item.productSelected
        if (type=== '-') {
          if (quantity === 1) {
            this.$message.warning('商品至少保留一件')
            return
          }
          --quantity
        } else if (type === '+') {
          if (quantity > item.productStock) {
            this.$message.warning('商品不能超过库存的数量')
            return
          }
          ++quantity
        } else {
          selected = !item.productSelected
        }
        this.axios.put(`/carts/${item.productId}`, {quantity, selected})
        .then(res => {
          this.getResData(res)
        })
        .catch(err => {
          console.error(err); 
        })
      },
      deleteProduct() {
        this.axios.delete(`/carts/${this.delSelectedId}`)
        .then(res => {
          this.$message.success('删除成功！')
          this.getResData(res)
        })
        .catch(err => {
          console.error(err); 
        })
        this.showDelTip = false
      },

      handleDelTip(val) {
        this.showDelTip = true
        this.delSelectedId = val
      }
    }
  }
</script>

<style lang='scss' scoped>
.cart {
  .wrapper {
    background-color: #f5f5f5;
    padding-top: 30px;
    padding-bottom: 114px;
    .cart-box {
      background-color: #ffffff;
      font-size: 14px;
      color: #999999;
      text-align: center;
      .checkbox {
        display: inline-block;
        width: 22px;
        height: 22px;
        border: 1px solid #e5e5e5;
        vertical-align: middle;
        margin-right: 17px;
        cursor: pointer;
        &.checked {
          background: url('/imgs/icon-gou.png') #ff6600 no-repeat center;
          background-size: 16px 12px;
          border: none;
        }
      }
      .cart-item-head {
        display: flex;
        height: 79px;
        line-height: 79px;
        .col-1 {
          flex:1;
        }
        .col-2 {
          flex: 2;
        }
        .col-3 {
          flex: 3;
        }
      }
      .cart-item-list {
        .cart-item {
          display: flex;
          align-items: center;
          height: 125px;
          border-top: 1px solid #e5e5e5;
          font-size: 16px;
          .item-check {
            flex: 1;
          }
          .item-name {
            flex: 3;
            font-size: 18px;
            color: #333;
            display: flex;
            align-items: center;
            img {
              width: 80px;
              height: 80px;
              vertical-align: middle;
            }
            span {
              margin-left: 30px;
            }
          }
          .item-price {
            flex: 1;
            color: #333333;
          }
          .item-num {
            flex: 2;
            .num-box {
              display: inline-block;
              width: 150px;
              height: 40px;
              line-height: 40px;
              border: 1px solid #e5e5e5;
              font-size: 14px;
              a {
                display: inline-block;
                width: 50px;
                color: #333;
              }
              span {
                display: inline-block;
                width: 50px;
                color: #333;
              }
            }
          }
          .item-total {
            flex: 1;
            color: #ff6600;
          }
          .item-del {
            flex: 1;
            width: 14px;
            height: 14px;
            background: url('/imgs/icon-close.png') no-repeat center;
            background-size: contain;
            cursor: pointer;
          }
        }
      }
    }
    .order-wrap {
      font-size: 14px;
      color: #666666;
      margin-top: 20px;
      height: 50px;
      line-height: 50px;
      .cart-tip {
        margin-left: 29px;
        a {
          color: #666666;
          margin-right: 37px;
        }
        span {
          color: #ff6600;
          margin: 0 5px;
        }
      }
      .total {
        font-size: 14px;
        color: #ff6600;
        span {
          font-size: 24px;
        }
        a {
          width: 202px;
          height: 50px;
          line-height: 50px;
          margin-left: 37px;
          font-size: 18px;
        }
      }
    }
  }
}
</style>
